An efficient certificateless public key encryption scheme with authorized equality test in healthcare environments

Hassan, Abdelrhman; Wang, Yong; Elhabob, Rashad; Eltayieb, Nabeil; Li, Fagen

doi:10.1016/j.sysarc.2020.101776

Cited by 39 publications

(13 citation statements)

References 20 publications

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“…23 However, the scheme provides only user-level authorization, where the server has permission to check overall ciphertexts for a given user's trapdoor. 4 Recently, Li et al 24 designed an IBE-ET-FA scheme supporting four authorization methods. The scheme enables users to perform the equivalence test with different levels of permission.…”

Section: Related Workmentioning

confidence: 99%

“…The output is 4 indicates to the condition that M = M ′ in Game-1.4. In comparison with Game-1.3, H 3 (g r 2 ) is replaced by  4.2 in Game-1.4.…”

Section: Output-phasementioning

confidence: 99%

“…Obviously, in Game-1. 4 and Game-1.5 the value C 4 is selected randomly. Therefore, based on ROM, if the condition  1.2 occurs, then Game-1.5 is same as Game-1.4.…”

Section: Output-phasementioning

confidence: 99%

“…Fortunately, social network service providers offer unlimited virtual storage, powerful processing capabilities, high availability, and low cost. 4,5 Therefore, big data as well as excessive computations tasks can be outsourced to the social servers with the abundant resources. 6 Even though this data make easier to promote recommendations, advertisements, and interesting photos and videos, 7,8 the security and privacy issues remain obstacles hindering the widespread deployment and adoption of the MSNs.…”

Section: Introductionmentioning

confidence: 99%

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An authorized equality test on identity‐based cryptosystem for mobile social networking applications

Hassan

Elhabob

Eltayieb

et al. 2021

Trans Emerging Tel Tech

Self Cite

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The widespread adoption of social network applications and smart mobile devices has yielded a massive amount of data transmitted through the networks. Fortunately, social network service providers offer a wide range of storage capacity and data management functionality. Accordingly, the data can be uploaded to the social servers for processing and then accessible elsewhere.Nevertheless, considering the untrusted nature of the social servers, it becomes crucial to protect the data before uploading it to the server. Unfortunately, encryption incurs another severe problem in providing search functionality on encrypted data stored on the server. In addition, most of the existing solutions are inefficient to deploy on mobile devices due to the limited resources and computing capabilities. To address this issue, we propose an authorized equality test on identity-based cryptosystem (AET-IBC) scheme in this article. The scheme allows the server to test if two different ciphertexts encapsulate the same message. Besides, it supports different authorization methods to enhance the privacy. Furthermore, based on the random oracle model, we prove the security of the proposed scheme to be equivalent to the modified bilinear Diffie-Hellman intractable assumption. Finally, the efficiency analysis shows that the AET-IBC scheme is practicable and convenient for mobile social networking applications.

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Section: Related Workmentioning

confidence: 99%

“…The output is 4 indicates to the condition that M = M ′ in Game-1.4. In comparison with Game-1.3, H 3 (g r 2 ) is replaced by  4.2 in Game-1.4.…”

Section: Output-phasementioning

confidence: 99%

“…Obviously, in Game-1. 4 and Game-1.5 the value C 4 is selected randomly. Therefore, based on ROM, if the condition  1.2 occurs, then Game-1.5 is same as Game-1.4.…”

Section: Output-phasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An authorized equality test on identity‐based cryptosystem for mobile social networking applications

Hassan

Elhabob

Eltayieb

et al. 2021

Trans Emerging Tel Tech

Self Cite

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show abstract

“…In fact, in order to search accurately and save computing resources, users generally execute multiple keywords retrieval. In addition, most existing CL-SPKE schemes also require that cloud server, which is presumed to be "honest-but-curious", can honestly perform search operations based on user needs [19], [20]. In real situations, a malevolent cloud server may return partial or fake search results.…”

Section: Introductionmentioning

confidence: 99%

Multi-Keyword Certificateless Searchable Public Key Authenticated Encryption Scheme Based on Blockchain

et al. 2020

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As a quite attractive secure search mechanism in cloud environments, searchable encryption allows encrypted files to be searched by keyword and does not reveal any information about original data files. However, most existing searchable encryption schemes only support single keyword ciphertext retrieval, and they cannot resist against inside keyword guessing attacks. Besides, the previous schemes rarely focus on integrity verification and fair transactions without any third party. Focusing on these problems, we propose a multi-keyword certificateless searchable public key authenticated encryption scheme based on blockchain. We use certificateless cryptosystem to encrypt keywords, which avoids the problems of certificate management in traditional cryptosystem and key escrow in identity-based cryptosystem. Our scheme also supports multi-keyword search, which locates encrypted files precisely and returns the desired files. Moreover, we upload the real encrypted files to the cloud server, while the encrypted indexes are put in blockchain, which ensures the anti-tampering, integrity and traceability of the encrypted indexes. The anti-tampering of blockchain also ensures that users can receive accurate search results without any third party verification. Furthermore, we utilize smart contract to track monetary rewards, which enables fair transactions between data owners and users without any trusted third party. We prove that the proposed scheme is secure against inside keyword guessing attacks in the random oracle model. Finally, our performance evaluation shows that the proposed scheme has higher computational performance than other related schemes.

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Efficient Public Key Cryptography Scheme with Equality Test for Heterogeneous Systems in IIoT

Hassan

Elhabob

Ibrahim

et al. 2021

Security, Privacy, and Anonymity in Computation, Communication, and Storage

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An efficient certificateless public key encryption scheme with authorized equality test in healthcare environments

Cited by 39 publications

References 20 publications

An authorized equality test on identity‐based cryptosystem for mobile social networking applications

An authorized equality test on identity‐based cryptosystem for mobile social networking applications

Multi-Keyword Certificateless Searchable Public Key Authenticated Encryption Scheme Based on Blockchain

Efficient Public Key Cryptography Scheme with Equality Test for Heterogeneous Systems in IIoT

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